Diskstation DS420j 4 Bay Network Attached Storage

  • 4-bay desktop NAS designed for home data backup
  • file syncing
  • sharing. 64-bit 4-core 1.4 GHz
  • 1 GB DDR4
  • 2 Year Warranty

2 In stock

£284.99 *
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Stock Code: HD-0B8-SY

EAN: 4711174723720

MPN: DS420j

Manufacturer: Synology

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Product information:

Diskstation DS420j 4 Bay Network Attached Storage

Affordable Data Management Solution For Your Home
DS420j is a 4-bay desktop NAS designed for home users' data backup and file sharing. It supports various networking protocols, multiple RAID configurations and diverse add-on packages, effortlessly enabling cross-platform file synchronization and sharing on a private cloud. DS420j is backed by Synology’s 2-year limited warranty.

- 4-bay home NAS with over 60 TB raw capacity support, suitable for data backup and file sharing
- 64-bit 4-core 1.4 GHz processor and 1 GB DDR4 memory
- Over 112 MB/s encrypted sequential reading and writing throughput
- Easy-to-deploy surveillance solution that supports up to 16 IP cameras
- Energy-saving design with only 7.88 W consumedin hibernation mode
- Backed by Synology 2-year limited warranty

Reliable 4-Bay Home NAS for Data Backup
Equipped with a 64-bit 4-core 1.4 GHz processor and 1 GB DDR4 memory, DS420j delivers encrypted sequential throughput at over 112 MB/s in reading and writing. It supports up to 64 TB raw capacity with 4 drive trays. Powered by Synology DiskStation Manager (DSM), DS420j offers various applications to optimize data backup and file sharing for home use, and is highly reliable to store and centralize your media files.

Intelligent Photo Library
Centralize your photos and videos in one private, organized place with Synology Moments and enjoy a modern browsing experience with image recognition techniques.
- Safely store your memorable moments on DS420j
- Group photos by topics based on deep learning algorithm
- Effortlessly find desired photos and share with friends and family
- Optimized browsing experience with super resolution
- Back up photos and free up storage space of mobile devices

Effective Sync and Backup Solution
DS420j can serve as a centralized backup destination, making it easy to create your own private cloud. Synology Cloud Sync keeps your Dropbox, Google Drive, Microsoft OneDrive, Baidu, and Box storage accounts in sync with DS420j at home. Synology Drive allows you to sync files across Windows, macOS, Linux, and mobile devices, effortlessly keeping everything up-to-date. Synology Hyper Backup provides multiversion backup with block-level incremental backup and cross-version deduplication. It has optimized storage utilization and allows data backup to multiple destinations, including local shared folders, external hard drives, network shared folders, rsync servers, and public cloud services.

24/7 Security Solution
Featuring user-friendly video management tools and an intuitive desktop-like interface, Synology Surveillance Station is a reliable private-security solution that can support multiple IP cameras connected to DS420j. Surveillance Station features optimized live view together with streamlined real-time monitoring. Its powerful analytics, such as motion detection and alert notification, allows you to stay informed of any suspicious activity with triggers sent via SMS, e-mail, and DS cam on mobile devices.

Energy Efficient with Green Design
DS420j is designed with energy efficiency in mind. Compared with its average PC counterpart, DS420j consumes relatively little power at 21.71 watts while accessing and 7.88 watts when hard drive hibernation is enabled. The power scheduling feature further reduces power consumption and operating costs.

Available Anytime and Anywhere
Synology provides mobile applications for you to enjoy your multimedia library anytime and anywhere. Available on iOS and Android™ platforms, DS photo, DS audio, DS video, and DS file allow access to your Synology NAS respectively through Photo Station, Audio Station, Video Station, and File Station. QuickConnect allows connection to your Synology NAS via a secure and customizable address, so that you can instantly access media and work files on any Windows, Mac, Linux computers, and mobile devices.

Technical Specifications :
- CPU Realtek RTD1296 4-core 1.4 GHz
- Memory 1 GB DDR4
- Compatible drive type 4 x 3.5" or 2.5" SATA HDD/SSD (drives not included)
- External port 2 x USB 3.0 port
- Size (HxWxD) 184 x 168 x 230 mm
- Weight 2.21 kg
- LAN 1 x Gigabit (RJ-45)
- Wake on LAN/WAN Yes
- Scheduled power on/off Yes
- System fan 2 (80 x 80 mm)
- AC input power voltage 100 V to 240 V AC
- Power frequency 50/60 Hz, single phase
- Operating temperature 0°C to 40°C (32°F to 104°F)
- Storage temperature -20°C to 60°C (-5°F to 140°F)
- Relative humidity 5% to 95% RH
- Maximum operating altitude 5,000 m (16,400 ft)

General DSM Specifications
- Networking protocol: SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN™, L2TP)
- File system: Internal: ext4, External: ext4, ext3, FAT, NTFS, HFS+, exFAT3
- Supported RAID type: Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
- Storage management: Maximum single volume size: 108TB, Maximum internal volume: 64
- File sharing capability: Maximum local user account: 1,024, Maximum local group: 256, Maximum shared folder: 256, Maximum concurrent SMB/NFS/AFP/FTP connection: 100
- Privilege: Windows Access Control List (ACL), application privilege
- Directory service: Windows® AD integration: Domain users login via SMB/NFS/AFP/FTP/File Station, LDAP integration
- Security: Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, HTTPS (customizable cipher suite)
- Supported client: Windows 7 onwards, Mac OS X® 10.11 onwards
- Supported browser: Chrome®, Firefox®, Edge®, Internet Explorer® 10 onwards, Safari® 10 onwards; Safari (iOS 10 onwards), Chrome (Android™ 6.0 onwards) on tablets


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Average customer rating

(from 1 customer reviews)
Last 6 Months (1)
All Time (1)

A very nice home/smalloffice NAS box.

Purchased to act as a home video/music/images repository (for streaming to various DLNA players around the house as well as via SMB share) and a backup host. I fitted it out with 4x Seagate 4TB IronWolf NAS drives (HD-36S-SE) and it hasn't missed a beat.

There isn't a video output - everything is accessible via a web interface. Out of the box it therefore requires DHCP but you can set it to a static IP after the initial configuration. About the only thing I've not been able to set up on it natively is Internet Radio streaming over DLNA (There's a 3rd-party Serviio app which allows this, but it requires Java and is thus a bit on the bloated side).

Speed-wise, it's able to utilize the full speed of its Gigabit ethernet port - For larger file transfers I've been hitting data transfers of 100 MB (note the capital B) per second consistently even whenever it's just plugged into a regular BT homehub. It runs cool and reasonably quiet (you'll hear the disks spinning rather than the fan) and there's an option to dim or turn off the front panel LEDs. By default it'll turn off the disks to save power after 20mins of inactivity. It's yet to have any lockups or crashes after several Terabytes of data going to/from it.
Honestly the only downside is that the drives load from the rear of the unit - so you need to unscrew the back screw to fit/remove them. But if you're not changing disks regularly then that's a non-issue. Would definitely recommend.

Mr David Wardlow 2020-02-26

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